Display screenshot in iOS

So, I'm capturing screenshots on iOS, using unity 2018.3. What I want to do is display all the screenshots in the directory. They're being saved in a specific directory on the iPhone.

I'm looking for a way to either open up and display/delete those screenshots natively using some sort of a plugin or to use a container to display the screenshots, that way I can let the user click a X button to delete screenshots displayed within the container.

With the second idea, I was having an issue as well. How would I scale the screenshots down to maintain performance. Cuz lets say there are very many screenshots in the application folder. I would like it so the performance doesn't take a hit.

Any ideas?